+2 - Chemistry - Important one mark questions -Third Set - Part 2

Part 2 of the third set. Questions from 8-14 are presented below.

8. ----------- is used in tracer bullets

(a) Ceria                (b) Thoria              (c) pyrophoric alloy                   (d) Mish metals

9. --------- metal ion is present in Haemoglobin

(a) Fe                    (b) Mg                    (c) Ca                              (d) Co

10. In the case of ₇N¹³   ₆C¹³ + x .The x is

(a) Anti neutron               (b) Electron           (c) Positron           (d) Neutron

11. Semi conductors are not used in

(a) Rectifiers                (b) Solar cells      (c) Transistors          (d) Super conducting magnets

12. The entropy of perfectly crystalline solid zero is at

(a) 0 K                        (b) 373 K             (c) 100°C               (d) 100 K

13. When a liquid boils there is an increase in

(a) Heat of vapourisation   (b) Free energy   (c) Kinetic energy   (d) Potential energy

14. At chemical equilibrium ∆G is

(a) Positive            (b) Negative           (c) Zero                 (d) None of these